WO2007069492A1

WO2007069492A1 - Charging nozzle, resin pellet charging system and method of charging resin pellet

Info

Publication number: WO2007069492A1
Application number: PCT/JP2006/324209
Authority: WO
Inventors: Kenichi Mitsuhashi
Original assignee: Idemitsu Kosan Co., Ltd.
Priority date: 2005-12-12
Filing date: 2006-12-05
Publication date: 2007-06-21
Also published as: CN101326104B; TWI361156B; TW200730402A; DE112006003356T5; JP2007161285A; CN101326104A; JP4916166B2

Abstract

Charging nozzle (10) for charging resin pellets kept in silo (20) into transport container (30), comprising superior part (11) connected to discharge aperture (21) of the silo (20) and inferior part (12) connected to charging aperture (31) of the transport container (30) wherein the superior part (11) includes inner tube (13) for guiding resin pellets discharged from the discharge aperture (21) of the silo (20) into the inferior part (12) and outer tube (14) for sheathing the circumference of the inner tube (13), and wherein the inferior part (12) includes mobile tube (15) inserted in the space (S) between the inner tube (13) and the outer tube (14) in such a fashion that movement thereof in anteroposterior, horizontal, vertical and oblique directions is allowed and guiding the resin pellets discharged from the inner tube (13) to the charging aperture (31) of the transport container (30). Accordingly, there can be exerted excellent dislocation absorbing action and can be attained removing of foreign matter from the resin pellets during charging.

Description

Specification

Filling nozzle, resin pellet filling system and resin pellet filling method

The present invention relates to a filling nozzle for filling resin pellets in a storage facility such as a silo into a container for transportation such as a lorry, a container, a resin pellet filling system, and a resin pellet filling method. Background Art Related to Filling Nozzle Suitable for Filling Polycarbonate-Based Resin Pellet, etc. that Need Foreign Objects, Wax Pellet Filling System, and Wafer Pellet Filling Method

[0002] Resin pellets requiring low foreign matter are known. For example, in the case of low foreign substance polycarbonate-based resin pellets used as a material for optical disk substrates, metal powder derived from equipment side forces such as silos and pipes, resin pelletization process (strands with high extruder power) It is required to reduce the content of grease waste generated by contact with the piping wall, etc. . This is because, in an optical disc having an optical disc substrate formed of the resin pellet, when the laser reads information recorded on the optical disc or writes information on the optical disc, foreign matter obstructs the transmission of the laser. This increases the number of errors. In particular, in recent years, with the increase in the storage capacity (recording density) of optical discs, the demand for reduction of contained foreign matters has become increasingly severe.

[0003] Further, along with an increase in global demand for optical disc products, the production volume of low foreign substance polycarbonate resin pellets has also increased, and the production facilities have become larger. Under such circumstances, in order to improve the transport efficiency of resin pellets, the use of lorries and containers has been proposed (see, for example, Patent Documents 1 to 4), but it is applied to resin pellets for optical disk substrates. In such a case, you must pay sufficient attention to the aforementioned foreign matter.

Patent Document 1: JP-A-11-208893

Patent Document 2: Japanese Patent Laid-Open No. 2000-355426

Patent Document 3: Japanese Patent Laid-Open No. 2001-261090 Patent Document 4: Japanese Unexamined Patent Publication No. 2003-335305

[0004] In order to prevent foreign matter from entering when transporting containers such as silos or other storage equipment such as silos or the like, the clean room (including clean booth) In such a clean environment, the nozzle and hose are connected to the transport container. At this time, the connection port of the transport container is not always at the same position every time due to the shift of the stop position due to the operation technology of the transport vehicle and the dimensional tolerance between the vehicle bodies. For this reason, the nozzles and hoses must be able to tolerate positional deviations of ± 50mm in the front-rear and left-right directions, ± 150mm in the vertical direction, and ± 5 ° in the tilt direction. In order to improve the efficiency (speed) of filling the resin pellets into the transport container, it is essential to increase the diameter of the nozzle and hose.

[0005] A stainless steel flexible hose is known as one that satisfies such a requirement. However, a stainless steel flexible hose, for example, with a diameter of 100 mm (4 inches), absorbs misalignment of ± 50 mm in the front and rear, left and right directions, ± 150 mm in the up and down directions, and ± 5 ° in the tilt direction. However, there is a problem that the length of 3m or more is required, and the clean room becomes larger just by losing operability.

If the diameter of the flexible hose is increased to 150 mm (6 inches), the hose will become heavier and the operability will be worse.

[0006] Further, when the inner surface of the flexible hose and the resin are rubbed, it is necessary to polish or clean the inner wall of the hose so as not to generate foreign matters derived from the hose. However, in order to make the hose flexible, it is common to make the hose bellows, but it is not easy to polish or clean the inner wall of the hose.

[0007] The present invention has been considered in view of the above circumstances, and is a compact filling nozzle capable of removing foreign substances from a filled resin pellet as long as it can exhibit an excellent displacement-absorbing action, and a resin. The purpose is to provide a pellet filling system and a method for filling a resin pellet.

Disclosure of the invention

[0008] In order to achieve the above object, the filling nozzle of the present invention is used for transporting the resin pellets in the silo. A filling nozzle for filling a container, comprising an upper part connected to an outlet of the silo and a lower part connected to a filling port of the transport container, wherein the upper part Silo discharge loca Provided with an inner cylinder that guides discharged resin pellets into the lower part, and an outer cylinder that covers the outer periphery of the inner cylinder, and the lower part includes a front-rear direction, a left-right direction, an up-down direction, and an inclination direction A movable cylinder that is inserted into a space between the inner cylinder and the outer cylinder in a state in which the movement of the inner cylinder and the outer cylinder is allowed to guide the resin pellet discharged from the inner cylinder to the filling port of the transport container. It is as.

[0009] In this way, while the filling nozzle is easier to miniaturize than the flexible hose, the movable cylinder is moved in the front-rear direction, the left-right direction, the up-down direction, that is, in the X, Y, and Z axial directions. Independent movement and tilting movement are possible, and an excellent displacement-absorbing action can be exhibited. For example, even if the length is about 2 m, it is possible to absorb a positional deviation of ± 50 mm in the front and rear and left and right directions, ± 150 mm in the upward and downward directions, and ± 5 ° in the tilt direction.

[0010] In the filling nozzle configured in this way, the space formed between the upper part and the lower part is used to cut the swarf pellet peculiar to the resin pellet from the resin pellet during filling. It can remove foreign substances such as greaves. For example, by exhausting the air that is also discharged from the filling loca of the transport container according to the filling amount of the resin pellets through the above space, the foreign matter contained in the exhausted material (waxed chips and oils) It is possible to reduce the content of foreign matter by the amount of debris.

[0011] In the filling nozzle of the present invention, the upper part may include an exhaust duct that exhausts air in the outer cylinder.

In this way, it is possible to connect the suction unit to the exhaust duct and positively exhaust the air containing foreign substances from the filling nozzle.

[0012] Further, the resin pellet filling system of the present invention includes an upper part connected to the silo discharge port and a lower part connected to the filling port of the transport container, and the upper part Is provided with an inner cylinder that guides the exhaust pellets of the silo discharged into the lower part and an outer cylinder that covers the outer periphery of the inner cylinder, and the lower part includes a front-rear direction, a left-right direction, and a vertical direction. In addition, the resin pellets inserted into the space between the inner cylinder and the outer cylinder in a state where the movement in the tilt direction is allowed and discharged from the inner cylinder are filled in the transport container. A filling nozzle for filling the transportation container with the resin pellets in the silo having a movable cylinder leading to the filling port, a clean room containing the filling nozzle, and a clean air blowing device for blowing clean air into the clean room; The exhaust device exhausts the air inside the outer cylinder to the outside of the clean room via the exhaust duct of the upper part.

[0013] By doing so, it is possible to keep the periphery of the filling nozzle in a clean state, and to prevent foreign matters from entering the filling nozzle and the transport container. Since the air in the outer cylinder is exhausted to the outside of the clean room through the exhaust duct of the upper part, the air containing foreign matter that can only actively remove foreign substances contained in the filled resin pellet is clean room. The inconvenience of being exhausted inside can be avoided.

[0014] Further, the resin pellet filling system of the present invention supplies clean air into the transport container through a clean air input port provided separately from the transport port of the transport container. It can be set as the structure provided with a means.

In this way, when opening and closing the filling port and connecting the filling nozzle to the filling port, by supplying clean air to the shipping container and keeping the inside of the shipping container at a positive pressure, the filling port force air Can prevent foreign substances from falling and entering and outside air from entering. In addition, if clean air is introduced into the container for transportation during filling, lightweight foreign matters such as sallow chips and swarf waste can be actively discharged together with air. The foreign matter content of the resin pellet filled in the transportation container can be further reduced.

[0015] Further, the method of filling a resin pellet according to the present invention is a resin pellet filling method for filling a resin container with a resin pellet in a silo, using the above resin pellet filling system, This is a method of filling the transport container with the resin pellets in the silo after communicating the discharge port of the silo and the fill port of the transport container through a filling nozzle.

In this way, the misalignment of the transport container is absorbed by the filling nozzle, and the space formed between the upper part and the lower part, which is simply connected to the filling nozzle and the transport container, is utilized. It is possible to remove lightweight foreign substances such as swarf scraps and swarf scraps from the filled sorghum pellets. [0016] In addition, the method for filling the resin pellets of the present invention includes the air volume ( _a ) _m ³ Zmin of the tarine air blown into the clean room and the internal cylinder internal force via the exhaust duct of the upper part. The relationship between the air volume of the air exhausted outside the clean room (b) m ³ Zmin and the air volume of the air discharged from the filling container according to the filling volume of the resin pellets (c) m ³ Zmin But

(c) ≤ (b) <(a)

Prefer to be a way to meet.

In this way, the inside of the tare room can be positively pressured so that the air discharged from the filling port of the transport container during filling (the amount of air corresponding to the filling amount of the resin pellets) can be reliably exhausted outside the clean room. It can keep the outside air from flowing into the clean room through the connection opening.

[0017] Further, in the method for filling the resin pellets of the present invention, the inner cylinder internal force is transmitted through the air volume ( _a ) _m ³ Zmin of the tarine air blown into the clean room and the exhaust duct of the upper part. The amount of air exhausted to the outside of the clean room (b) m ³ Zmin, and the amount of air discharged from the filling container according to the filling amount of the resin pellets (c) m ³ Zmin, The amount of clean air flow into the transport container through the clean air inlet (d) m ³ Zmin

(c) + (d) ≤ (b) <(a)

Prefer to be a way to meet.

In this way, the air that is discharged from the filling port of the transport container during filling (filling amount of the resin pellets and the amount of air equivalent to the clean air that is put into the transport container) is taken out of the clean room. The clean room can be kept at a positive pressure as long as it can be exhausted reliably, and the flow of outside air from the connection opening to the clean room can be prevented.

As described above, according to the present invention, although it is a filling nozzle that can be easily reduced in size as compared with a flexible hose, it is possible to reduce the size of the movable cylinder in the front-rear direction, the left-right direction, the vertical direction, that is, X, Y, Z Independent movement in each axial direction and movement in the tilt direction are possible, and the movement in the tilt direction can exhibit an excellent displacement-absorbing action. As a result, it is possible to avoid an increase in the size of the clean room, reduce costs of the resin pellet filling system, and improve operability. The

Since the foreign material can be removed from the filled resin pellets using the space formed between the upper and lower parts, the content of foreign material in the resin pellets filled in the transport container is reduced. It becomes possible to make it.

Brief Description of Drawings

[0019] [Fig. 1] (a) is a front view of a filling nozzle according to an embodiment of the present invention, (b) is a partially sectional front view showing an upper part of the filling nozzle according to an embodiment of the present invention, ( c) is a partially sectional front view showing a lower part of a filling nozzle according to an embodiment of the present invention.

[FIG. 2] (a) is a front view showing the displacement displacement absorbing function (left-right direction and up-down direction) of the filling nozzle according to the embodiment of the present invention, and (b) is the position of the filling nozzle according to the embodiment of the present invention. It is a front view which shows a shift | offset | difference absorption effect (inclination direction).

FIG. 3 is an explanatory diagram showing an overall configuration of a resin pellet filling system according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0021] [Filling nozzle]

First, a filling nozzle according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

1 (a) is a front view of a filling nozzle according to an embodiment of the present invention, FIG. 1 (b) is a partially sectional front view showing an upper part of the filling nozzle according to an embodiment of the present invention, and FIG. (C) is a partially sectional front view showing the lower part of the filling nozzle according to the embodiment of the present invention, and (a) of FIG. FIG. 2 (b) is a front view showing the displacement displacement absorbing action (inclination direction) of the filling nozzle according to the embodiment of the present invention.

[0022] The filling nozzle 10 shown in FIG. 1 is for filling the pellets in the silo into the transport container, and includes an upper part 11 connected to the silo discharge port, and the transport container. The lower part 12 connected to the filling port is provided.

The upper part 11 has a double cylinder structure including an inner cylinder 13 and an outer cylinder 14, and the upper end of the inner cylinder 13 Is connected to the silo discharge port, the silo discharge loci discharged into the lower part 12 are guided along the inner periphery of the inner cylinder 13.

The outer cylinder 14 covers the outer periphery of the inner cylinder 13 via a predetermined space S. Above the space S is an inward flange formed at the upper end of the outer cylinder 14, or a force covered by an outward flange formed at the inner cylinder 13, and below the space S is in an open state. .

[0023] The lower part 12 is provided with a funnel-shaped movable cylinder 15 having an inclined step portion formed on the lower end side. When filling, the lower part 12 is connected to the filling port of the transport container, thereby forming an inner part. Cylinder 13 Force The discharged resin pellet passes through the funnel-shaped lower end of the movable cylinder 15 and is guided to the filling port of the transport container. The movable cylinder 15 has a larger diameter than the inner cylinder 13 and a smaller diameter than the outer cylinder 14, and moves independently in the front-rear direction, the left-right direction, and the up-down direction, that is, the X, Y, and Z axial directions. And inserted into the space S between the inner cylinder 13 and the outer cylinder 14 from below in a state in which the movement in the tilt direction is possible, and through a flexible support mechanism, for example, a suspension mechanism by the flexible chain 17 And supported by the upper part 11.

[0024] In this way, while the filling nozzle 10 is easier to compact than the flexible hose, as shown in FIG. 2, the movable cylinder 15 has a longitudinal direction, a lateral direction, a vertical direction, and a tilting direction. Due to this movement, it is possible to achieve excellent displacement absorption and to easily connect with a transport container. For example, the outer diameter of the inner cylinder 13 is 101.6 mm, the inner diameter is 95 mm, the outer diameter of the outer cylinder 14 is 400 mm, the inner diameter is 394 mm, the outer diameter of the movable cylinder 15 is 250 mm, and the inner diameter is When 244mm, even with a filling nozzle 10 with a length (height) of about 2m, positional deviation of ± 50mm in the front / rear and left / right directions, ± 150mm in the up / down direction, and ± 5 ° in the tilt direction Can be absorbed.

[0025] Further, according to the filling nozzle 10 configured in this way, the space S formed between the upper part 11 and the lower part 12 is used to remove foreign substances from the resin pellets being filled. Can do. For example, if the air that is also discharged from the filling loca of the transport container is exhausted through the space S according to the filling amount of the resin pellets, the foreign matter contained in the exhaust (such as the resin cut powder, the resin waste, etc. It is possible to reduce the foreign matter content by the amount of).

When performing such exhaust, the upper part 11 is provided with an exhaust duct 16 for exhausting the air in the outer cylinder 14, and a suction unit is connected to the exhaust duct 16 to fill the air containing foreign matter. By positively exhausting from the inside of the nozzle 10, a more preferable foreign matter removing effect can be exhibited.

[0026] [Resin pellet filling system]

Next, a resin pellet filling system according to an embodiment of the present invention will be described with reference to FIG.

FIG. 3 is an explanatory diagram showing the overall configuration of the resin pellet filling system according to the embodiment of the present invention.

The resin pellet filling system shown in this figure is a system for filling the resin pellets in the silo 20 into the transport container 30, and is a clean booth that accommodates the filling nozzle 10 and the filling nozzle 10 described above. (Clean room) 40, clean air blowing device (clean air blowing means) 50 that blows clean air into the clean booth 40, and the air in the outer cylinder 14 through the exhaust duct 16 of the upper part 11 of the clean booth 40 And an exhaust unit (filling nozzle exhaust means) 60 for exhausting outside.

[0027] The silo 20 stores a resin pellet such as a low foreign substance polycarbonate resin pellet, and discharges the resin pellet from a discharge port 21 formed at the lower end.

The transport container 30 is a lorry or a container that can be transported by a vehicle. In the present embodiment, a lorry that can be dumped up is used as the transport container 30.

The container 30 for transportation made of lorries is dumped up at the time of filling. The transport container 30 has a filling port 31 at the upper part on the front end side which is the dump-up side, and the filling port 31 is covered with a dust cap 32. The dust cap 32 is removed before or after the transport container 30 is dumped up.

In addition, there is also a lorry that does not dump up the transport container at the time of filling, and fills it in a horizontal state. In this case, in order to increase the filling efficiency, it is necessary to provide multiple filling ports in the transport container and fill it multiple times. It is necessary to provide a plurality of filling nozzles at once. For this reason, the work becomes complicated, and the opportunity to mix foreign foreign matters increases every time the filling port is opened and closed, and the filling nozzle is connected and detached.

[0028] The clean booth 40 is provided on the upper floor of the space that accommodates the transport container 30, for example, on the second floor of a building in which the resin pellet filling system is constructed. 40 clean booths The filling nozzle 10 connected to the discharge port 21 of the silo 20 is suspended on the ceiling, and the connection for connecting the filling nozzle 10 to the filling port 31 of the transport container 30 is carried on the floor of the clean booth 40. Opening 41 is formed.

The clean air blowing device 50 is composed of, for example, a fan unit installed behind the ceiling of the clean booth 40. The fan unit has a prefilter or HEAP filter (99.97% of suspended particulates of 0.3 m or more). More preferably, the outside air (clean air) filtered by the ULPA filter is blown into the clean booth 40 with the ceiling force. The exhaust unit 60 is configured using, for example, a suction unit that sucks the air in the outer cylinder 14 to the outside of the clean booth 40 via the clean pipe 61 connected to the exhaust duct 16.

[0029] According to the resin pellet filling system configured as described above, when the resin pellet in the silo 20 is filled into the transport container 30 through the filling nozzle 10, the periphery of the filling nozzle 10 is arranged. Maintaining a clean state, foreign matter can be prevented from entering the filling nozzle 10 and the transport container 30. Moreover, since the air in the outer cylinder 14 is exhausted outside the tarine booth 40 through the exhaust duct 16 of the upper part 11, foreign substances contained in the filled resin pellets can be actively removed, and further Air containing air is exhausted into the clean booth 40 and the inside can be avoided.

[0030] In addition, the above-described resin pellet filling system includes a clean air input device 70 for supplying clean air into the transport container 30 via a clean air input port 33 provided separately from the filling port 31. It is preferable. The clean air input device 70 includes, for example, a clean air supply means (not shown) such as a compressor unit or a blower equipped with a HE PA filter, a coupler 71 connectable to the clean air input port 33, the coupler 71 and the tally. And a clean air input line (pressure resistant PVC hose) 72 connecting the air supply means.

With such a clean air injection device 70, when the opening and closing operation of the filling port 31 and the connection operation of the filling nozzle 10 to the filling port 31 are performed, the filling port 31 is supplied by supplying clean air to the transport container 30. Air can be blown out to prevent foreign objects from falling, mixing, and outside air. Also, if clean air is introduced into the transporting container 30 during filling, fine powdery foreign substances such as chips and greased waste contained in the resin pellets are loaded from the filling port 31 together with air. Since it can be discharged extremely, it is possible to further reduce the foreign matter content of the resin pellet filled in the transport container 30.

[0031] Further, a sampling nozzle 80 and a clean air gun 90 may be provided in the resin pellet filling system.

The sampling nozzle 80 is used to sample the resin pellets stored in the silo 20 and check the quality of the pellets before filling into the transport container 30. The sampling nozzle 80 is connected to the silo 20 via a pipe 81. ing.

The clean air gun 90 blows away dust adhering around the filling port 31 and dust cap 32 before opening the filling port 31 of the transport container 30 and cleans and removes it. For example, it is connected to clean air supply means (not shown) via a pressure resistant PVC hose 91.

[0032] [Method of filling the resin pellet]

Next, a method for filling a resin pellet according to an embodiment of the present invention will be described with reference to FIGS.

The resin pellet filling method according to the embodiment of the present invention is a method for filling the resin container 30 with the resin pellets in the silo 20, and using the above-described resin pellet filling system, the filling nozzle 10 The exhaust port 21 of the silo 20 and the filling port 31 of the transport container 30 are communicated with each other, and then the resin pellets in the silo 20 are filled into the transport container 30.

According to such a resin pellet filling method, the misalignment of the transportation container 30 is absorbed by the filling nozzle 10, so that the connection between the filling nozzle 10 and the transportation container 30 is facilitated. Further, by using the space S formed between the upper part 11 and the lower part 12, fine powdery foreign matters such as swarf dust can be removed from the filled grease pellets.

[0033] During filling of the resin pellets, the air volume of clean air blown into the clean booth 40 (a) m ³ Zmin and the internal force of the outer cylinder 14 are also clean through the exhaust duct 16 of the upper part 11. The volume of air exhausted outside the booth 40 (b) m ³ Zmin and the volume of air exhausted from the filling port 31 of the transport container 30 (c) m ³ Zmin Relationship (c) ≤ (b) <(a)

It is preferable to satisfy.

In this way, the air discharged from the filling port 31 of the transport container 30 during filling (the amount of air corresponding to the filling amount of the resin pellet) can be reliably exhausted. Further, the inside of the clean booth 40 can be kept at a positive pressure, and contamination due to the outside air flowing into the clean booth 40 from the connection opening 41 can be prevented.

[0034] In addition, when clean air is supplied to the transport container 30 from the clean air inlet 33 during filling of the resin pellets, the amount of clean air blown into the clean booth 40 (a) m ³ Zmin , The volume of air exhausted from the outer cylinder 14 through the exhaust duct 16 of the upper part 11 to the outside of the clean booth 40 (b) m ³ Zmin and the transport container 30 according to the filling amount of the resin pellets 30 The air volume of the air discharged from the filling port 31 (c) m ³ Zmin and the air volume of the clean air that is introduced into the transport container 30 through the clean air inlet 33 (d) m ³ / min Relationship

(c) + (d) ≤ (b) <(a)

It is preferable to satisfy.

In this way, the foreign matter contained in the resin pellets being filled can be positively discharged from the filling port 31 by the cleaner introduced into the transport container 30 from the clean air inlet 33. In addition, air discharged from the filling port 31 of the transport container 30 during filling (filling amount of the resin pellets and an amount of air equivalent to clean air charged into the transport container 30) can be reliably exhausted. . Furthermore, the inside of the clean booth 40 can be kept at a positive pressure, and contamination due to the outside air flowing into the tarin booth 40 from the connection opening 41 can be prevented.

[0035] Next, a specific procedure of the method of filling the resin pellet will be described. However, the grease pellets shall be filled while clean air is being supplied from the clean air inlet 33 to the transport container 30.

When filling the transport container 30 with the resin pellets in the silo 20, stop the vehicle on which the transport container 30 is mounted at a predetermined position on the first floor, and then use the dust cap of the transport container 30 32 And dump the container 30 for transportation.

Workers on the second floor (clean booth 40) are allowed to remove dust adhering to dust cap 32 and its surroundings. Remove with a clean air gun 90, alcohol, or clean ヮ inno (dust-proof cloth). On the other hand, the worker on the first floor connects the clean air inlet device 70 to the clean air inlet 33 of the transport container 30 and starts to supply clean air to the transport container 30. When it is confirmed that clean air has been introduced into the transport container 30, an operator on the second floor opens the dust cap 32 at the filling port 31. At this time, since air is blown out from the filling port 31, even if the filling port 31 is opened upward and opened, dust, clean wiper, etc. can be prevented from falling into the container.

Next, the worker on the second floor moves the movable cylinder 15 of the filling nozzle 10 and aligns the lower end portion thereof with the filling port 31 of the transport container 30. At this time, the movable cylinder 15 moves by a predetermined amount in the front-rear direction, the left-right direction, the up-down direction, and the tilt direction, and exhibits a good displacement-absorbing action. Therefore, the connecting operation to the filling port 31 of the transport container 30 is easily performed. be able to. When the filling nozzle 10 is connected to the filling port 31 of the transport container 30, the resin pellets are discharged from the silo 20 and filling of the resin pellets into the transport container 30 is started. During filling, the internal force of the outer cylinder 14 is also exhausted outside the clean booth 40 through the air volume (a) m ³ Zmin of clean air blown into the clean booth 40 and the exhaust duct 16 of the upper part 11. Air flow rate (b) m ³ Zmin and the air volume of air that also discharges the filling port 31 of the transport container 30 according to the filling amount of the resin pellets (c) m ³ Zmin and the clean air input port 33 The amount of clean air flow into the transport container 30 (d) m ³ Zmin

(c) + (d) ≤ (b) <(a)

Keep the condition to meet.

That is, when filling of the resin pellets is started, air (c) and air supplied from the clean air input port 33 are supplied from the filling port 31 of the transport container 30 according to the filling amount of the resin pellets. If (d) blows out but there is no exhaust (b) from the exhaust duct 16, foreign matter such as chips contained in the resin pellet will leak out from the filling nozzle 10 and contaminate the clean booth 40. Therefore, the clean booth 40 is kept clean by securing an exhaust amount (b) larger than the air amount (c) + (d) of the air blown from the filling port 31 of the transport container 30.

In addition, if the displacement (b) is too large, the air (a) that maintains the cleanliness in the clean booth 40 (positive pressure with respect to the external air pressure) is sucked as exhaust (b), Clean booth 40 Since the inside of the chamber becomes negative pressure and outside air flows from the connection opening 41 and pollutes the inside of the clean booth 40, clean air (a) larger than the exhaust volume (b) is put into the clean booth 40. Blow out.

Note that if clean air is introduced into the transport container 30 during filling, the amount of air blown from the filling port 31 increases, and the drop speed of the resin pallet decreases due to air resistance, so that the time required for filling increases accordingly. However, if the amount of air blown out from the filling port 31 is increased, foreign matter such as chips contained in the resin pellet is exhausted together with air, so that the amount of foreign material contained in the resin pellet is further reduced. I can expect.

[0038] It should be noted that the present invention is not limited to the above-described embodiments, and can be appropriately changed within the scope described in the claims. For example, in the above embodiment, a lorry is used as a transportation container, but a container (a cylinder, a rectangular parallelepiped, etc., any shape) may be used. Further, the container may be filled in a horizontal state without dumping up the transport container. However, when a horizontal transportation container is filled with resin pellets at a single location, the filling efficiency decreases due to the angle of repose of the resin pellets, so multiple (for example, 3 to 4) filling ports can be used simultaneously. Or it is preferable to fill sequentially.

[0039] The resin pellets targeted by the present invention are not limited in material as long as they require low foreign matter. For example, low foreign substance polycarbonate-based resin pellets currently mass-produced for optical discs, low foreign substance hexane-based resin pellets that may be used in next-generation optical disks, and coating of high-voltage wire cables It can be applied to the filling of low foreign polyethylene resin pellets used for materials. Industrial applicability

[0040] The present invention can be applied to a filling nozzle, a resin pellet filling system, and a resin pellet filling method for filling resin pellets in a silo into a transport container such as a lorry or a container. It can be suitably used for filling required polycarbonate-based resin pellets.

Claims

The scope of the claims

[1] A filling nozzle for filling the transportation container with the resin pellets in the silo, the upper part connected to the discharge port of the silo;

A lower part connected to the filling port of the transport container;

The upper part is

The silo discharge loca comprises an inner cylinder that guides discharged resin pellets into the lower part, and an outer cylinder that covers the outer periphery of the inner cylinder,

The lower part is

The resin pellets inserted into the space between the inner cylinder and the outer cylinder and allowed to move in the front-rear direction, the left-right direction, the up-down direction, and the tilt direction and discharged from the inner cylinder are used for the transportation. With a movable cylinder that leads to the filling port of the container

A filling nozzle characterized by that.

[2] The upper part is

Provided with an exhaust duct for exhausting air in the outer cylinder

The filling nozzle according to claim 1.

[3] A resin pellet having an upper part connected to the silo discharge port and a lower part connected to the filling port of the transport container, the upper part being discharged from the silo discharge loca An inner cylinder that guides the inner cylinder into the lower part, and an outer cylinder that covers the outer periphery of the inner cylinder, and the lower cylinder is allowed to move in the front-rear direction, the left-right direction, the up-down direction, and the tilt direction. The resin pellet in the silo having a movable cylinder that is inserted into the space between the outer cylinder and the outer cylinder and is discharged from the inner cylinder is guided to the filling port of the transport container. A filling nozzle for filling

A clean room containing the filling nozzle;

A clean air blowing device that blows clean air into the clean room, and an exhaust device that exhausts the air in the outer cylinder to the outside of the clean room via the exhaust duct of the upper part.

A resin pellet filling system characterized by that.

[4] Provided with a clean air input device for supplying clean air into the transport container through a clean air input port provided separately from the filling port of the transport container

The resin pellet filling system according to claim 3, wherein:

[5] A resin pellet having an upper part connected to the silo discharge port and a lower part connected to the filling port of the transport container, the upper part being discharged from the silo discharge loca An inner cylinder that guides the inner cylinder into the lower part, and an outer cylinder that covers the outer periphery of the inner cylinder, and the lower cylinder is allowed to move in the front-rear direction, the left-right direction, the up-down direction, and the tilt direction. The resin pellet in the silo having a movable cylinder that is inserted into the space between the outer cylinder and the outer cylinder and is discharged from the inner cylinder is guided to the filling port of the transport container. A filling nozzle for filling

A clean room containing the filling nozzle;

A clean air blowing device that blows clean air into the clean room, and a resin pellet filling system that includes an exhaust device that exhausts the air in the outer cylinder to the outside of the clean room via the exhaust duct of the upper part,

Via the filling nozzle, the discharge port of the silo and the filling port of the transport container are communicated, and then the resin pellet in the silo is filled into the transport container.

A method for filling a resin pellet characterized by the above.

[6] Air volume of clean air blown into the clean room (a) m ³ Zmin;

The amount of air exhausted from the outer cylinder to the outside of the clean room through the exhaust duct of the upper part (b) m ³ Zmin,

Depending on the filling amount of the resin pellets, the relationship between the air volume of the air discharged from the filling container of the transport container (c) m ³ Zmin

(c) ≤ (b) <(a)

6. The method for filling a resin pellet according to claim 5, wherein:

[7] Using the resin pellet filling system according to claim 4,

The amount of clean air blown into the clean room (a) m ³ Zmin,

The amount of air exhausted from the outer cylinder to the outside of the clean room through the exhaust duct of the upper part (b) m ³ Zmin, Depending on the filling amount of the resin pellets, the air volume (cm / min and

The relationship with the air volume (d) m ³ Zmin of the clean air introduced into the transport container through the clean air inlet

(c) + (d) ≤ (b) <(a)

The resin pellet filling method characterized by satisfy | filling.